#include <stdio.h>
void main()
{
    int i ,j, x, n=0;
    for(i=1;n==0;i++)
    {
        for(j=1,x=i;j<=4&&x>=11;j++)
            if((x+1)%(j+1)==0)
                x-=(x+1)/(j+1);
            else
            {
                x=0;
                break;
            }
        if(j==5&&x==11)
        {
            printf("There are %d fishess at first.\n",i);
            n=1;
        }
    }
}